Ignition device for explosive-engines.



H. R. STUART.

IGNITION DEVICE FOR EXPLOSIVE ENGINES.

APPLICATION FILED 050.29. 1913.

1,150,463. Patented Aug. 17, 1915.

2 SHEETS-SH EET1.

GEM/man H. R. STUART.

IGNITION DEVICE FOR EXPLOSIVE ENGINES.

APPLICATION FILED DEC. 29. 1913.

1,150,463. Patented Aug. 17, 1915.

2 SHEETS-SHEET 2.

gwuzuto'o wwgww I I awn/(431W [@QM UNITED STATES PA NT OFFICE.

HARVE R. STUART, OF SPRINGFIELD, OHIO, ASSIGNOR TO THE ROBBINS 86 MYERS COMPANY, OF SPRINGFIELD, OHIO, A CORPORATION OF OHIO.

IGNITION DEVICE FOR EXPLOSIVE-ENGINES.

To all whom it may concern:

Be it known that I, HARVE R. STUART, a citizen of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new -and useful Improvements in Ignition Devices for Explosive-Engines, of which the following is a specification.

My invention relates to ignition devices for explosive engines and it is especially designed to operate in connection with an ordinary magneto so as to increase the spark in starting the engine or to give a normal spark at a lower speed.

The invention'consists in the construction and combination hereinafter described and set forth in the claims.

' In the accompanying drawings, Figure 1 is a diagrammatic view showing the arrangement of mechanism and circuits embodying my invention. Fig. 2 is an enlarged view of a portion of the same. Fig. 3 is a similar view showing the same slightly modified.

Like parts are represented by similar characters'of reference in the several views.

In the accompanying drawings, a represents an ordinary explosive engine such as used in automobiles.

Z) is the-magneto which is connected in the usual way by the wires 0 and c to the distributer d and the engine 0; respectively; Wires 1, 2, 3 and 4 leading from the distributer to the respective spark plugs in the usual way.

e is the timer connected in a shunt across the wires 0 and 0 with a condenser in the usual way, all of these constructions being in common practice.

In order to give a hotter spark in starting, or a normal spark at a lower speed of the magneto than the normal speed, I provide means for temporarily increasing the magnetic strength or field of the magneto and this I do by providing the permanent magnet b of the magneto with coils b and b which are placed in circuit with some source of electro-motive force. In Fig. 1, I

have shown these coils b in circuit with a battery 72 and an electric motor I), the connections being made from one terminal of the battery by the wire 5 to switch 6, wire 7, coil 6 coil 6'', wire 8 to motor I) and wire 9 to the other terminal of the bat tery. The motor I) in this case is the start- Speciflcation of Letters Patent.

Patented Aug. 1'7, 1915.

Application filed December 29, 1913. Serial No. 809,273.

ing motor such as is frequently used for starting explosive engines, especially in automobiles, and the switch 6 being the starting switch. By this arrangement it will be seen that upon closing the switch 6, current from the battery 12* to operate motor 6 and thus to start or crank the engine, will pass through the coils b and 6 thus reinforcing the magnetic fields of the magneto b and likewise its voltage, so that a hotter spark is produced, or a normal spark at a much lower speed. than normal, which insures the ignition in therespective cylinders 1n starting the engine and as soon as the englne is started, the motor I) will be disconnected by opening the switch 6 in the usual way, which cuts out the coils b and 6 thus restoring the magneto to its normal condltion. Substantially the same arrangement is shown in Fig. 2, where the magneto s shown enlarged and the motor 5 is shown in diagram and in circuit with the battery 6 the arrangement being such that when the switch 6 is closed, the current is passed from a suitable source of supply through the magneto coils b and-b thus increasing the voltage of said magneto. In Fig. 3, I have shown substantially the same arrangement excepting that the motor 6 is omitted and the battery b only is put into the circult for supplying current to the coils b and 6 this being a simple arrangement which would be used in case a motor is not employed, where the machine is cranked b hand or otherwise.

It is obvious that the battery 6 may represent any source of supply for the current, whlch will energize the coils b and b to increase the magnetic fields of the magneto.

Having thus described my invention, I

claim: l The combination of a magneto and an 1gn1t1on circuit for explosive engines, a current supply independent of said magneto, an electromagnetic device associated with the magnetic field of the magneto controlled by said independent current supply, and means for opening and closing said circuit so as to temporarily increase the strength of the field of said magneto and thus increase the strength of the current produced thereby. as and for the purpose specified.

2. In an ignition system for explosive englnes, a magneto, a connection from said magneto to igniting devices in said engine,

a starter for said engine, coils around the magnet of said magneto, a current supply independent of said magneto, and means for connecting and disconnecting said current supply to said coils to temporarily increase the magnetic fields of said magneto when the starter is operated, as and for the purpose specified.

3. In an ignition system for explosive engines, a magneto'and connections from said magneto to igniting devices in an explosive engine, coils associated With the fields of said magneto, a source of electric supply and a motor in circuit therewith, and means for connecting said motor and current source in circuit With said coils, so as to increase the magneticlfields of said magneto'when the motor is operated, as and for the purpose specified.

4. In a system of ignition for explosive engines, a magneto connected to the'igniting devices of an explosive engine, a motor for starting said engine, a source of current supply for said motor, coils associated With the fields of said magneto and means for connectingsaid coils and said motor simultaneously to said source of supply, as and for the purpose specified.

In testimony whereof, I have hereunto set my hand this 15th day of December 1913.

- HARVE R. STUART.

Witnesses:

CHAS. l1. VVELGH, ESTHER E. Prnrrnn. 

